Google's 2011 Earth Day doodle
Google has gone interactive for it's 11th Earth Day doodle that has in it ticklish pandas, frolicking penguins, a growling lion, a cascading waterfall, waterfall climbing fish, a fish devouring bear, birds, ****erflies, a koala and a jumping frog. We take you back to the previous ten doodles that Google doodled to celebrate April 22.

Google's 2001 Earth Day doodle
The first Google Earth Day doodle, back in April 22, 2001 was a simple. The 'O's in the Google logo were replaced by the western and the eastern hemisphere for the earth.

Google's 2003 Earth Day doodle
The 2003 Google Earth Day doodle had some beings from outer space. Two aliens gaze at the earth sitting atop the Google logo, quite like how lovebirds on earth look at the moon.